<template>
  <view class="cart-container" v-if="cart.length !==0">
    <!-- 收货地址 -->
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文字 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域 -->
    <uni-swipe-action>
      <block v-for="(goods,index) in cart" :key="index">
        <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
          <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <!-- 结算区域 -->
    <my-settle></my-settle>
  </view>
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image class="empty-img" src="/static/cart_border@2x.png"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar_badge.js'
  import {mapState,mapMutations} from 'vuex'
  export default {
    mixins:[badgeMix],
    computed:{
      ...mapState('m_cart',['cart'])
    },
    data() {
      return {
        options:[{
          text:'删除',//显示的文本内容
          style:{
            backgroundColor:'#C00000'//按钮的背景颜色
          }
        }]
      };
    },
    methods:{
      ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','removeGoodsById']),
      // 商品的勾选状态发生了变化
      radioChangeHandler(e){
        this.updateGoodsState(e)
      },
      numberChangeHandler(e){
        this.updateGoodsCount(e)
      },
      swipeActionClickHandler(goods){
        this.removeGoodsById(goods.goods_id)
      }
    }
  }
</script>

<style lang="scss" scoped>
  .cart-container{
    padding-bottom: 50px;
    // 购物车标题区域的样式
    .cart-title{
      display: flex;
      align-items: center;
      height: 40px;
      font-size: 14px;
      padding-left: 5px;
      border-bottom: 1px solid #efefef;
      
      .cart-title-text{
        margin-left: 10px;
      }
    }
  }
  // 空白购物车区域的样式
  .empty-cart{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
    
    .empty-img{
      width: 90px;
      height: 90px;
    }
    
    .tip-text{
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
